PICO-8 print behavior is inconsistent with Lua standard:
mmt={}
mt=setmetatable({},mmt)
t=setmetatable({},mt)
function mmt:__index(k)
print('mt.'..k)
end
print(t) |
This code should not output mt._tostring as, per language manual, I quote: "the access to a metamethod does not invoke other metamethods". You can check it on the official Lua demo too.
4 comments
Just kicked off my Let's Play series on youtube where I do what I can to complete PICO-8 games 100%. Not sure there is much else than that to say I guess :) Check it out!
0 comments
Version 2
- Added Tutorial/How to play (❎ from title screen);
- Music: you can now play the music at a slower tempo like in the original game;
- Added: "Last score" in Stats page;
- Fixed bug: jumping while easing on ladders (thanks to Pico-8 Gamer)
Controls:
⬆️⬇️⬅️➡️ move
⭕️ [Z] Jump
❎ [X] Skip / continue / Start tutorial (from title screen)
Remake:
The original game for Commodore 64 is "China Miner" by Ian Gray.
(c)1984 Interceptor Software.
How to play
Miner Wally is the only person to know the location of the Jade Mines belonging to the Pong Dynasty in China. On each of the 30 screens you must collect four objects (pickaxe, candle, lantern and jade vase) before collecting the key to move onto the next stage. As well as the platforms to negotiate you must also avoid the various creatures that populate the mine and if you touch any of them then you lose one of the nine lives, are sent to the start of the screen and all objects reappear. There are various obstacles to avoid or use like lasers, moving platforms and platforms that disintegrate when stepped on. Falling from heights also loses you a life.
14 comments
So I wanted to experiment with Pico-8's bitplane drawing features (see https://www.lexaloffle.com/bbs/?tid=54215) and specifically to see if I could make a palette that worked sort of like the idea behind 16-color CGA: four-channel (one bit per channel) RGBI color. (Pico-8 doesn't have quite enough blue for this to work comfortably but I'll keep experimenting.) But to play with it, I wanted to be able to scribble with the palette, drawing "with specific bits".
So I threw together a thing!
This mouse-driven cart lets you scribble using a velocity-sensitive pen. Left four checkboxes in the tool panel set the high four bits of the palette mask, right four set the low four. (For some reason this made more spatial sense to my brain for where "color" and "mask" go even though it's backwards from the bits.) Click the "explosion" button to clear the drawing area. I have been too lazy to implement a KABOOM sound effect but patches are welcome.
1 comment
Quoridor: Apples VS Oranges
This is my port of the board game Quoridor created by Mirko Marchesi.
In my version of the game, the pawns are replaced with "fruit" because it works better with the color palette. All of the rules are programmed into the game logic to prevent any illegal moves. Unlike other online versions of the game, the fruits start on the sides of the board, rather than on top and bottom. I think this makes it much more comfortable to play in local multiplayer.
There are a few more features I want to add, but this version is basically complete. Have fun!
The physical game is published by Gigamic Games and is available from many stores. Check out the
1 comment
Exporting worked earlier but now when I attempt it I get this response.
Not Writing Properly
Not passed limit
Uncomplete installs
3 comments
Hello Lexaloffle community, I have spent a couple of days learning Picotron. Figuring out how to modify files etc. I was wondering if anyone would be interested in me writing a full tutorial/documentation on how to use it, containing a full list of terminal commands (not only the ones specified by using the help cmd) and a full list of commands for the programming language. Containing information about each command. If anyone is interested in this please tell me.
Best Wishes, @grandel234
Picotron Playground:
https://www.lexaloffle.com/picotron.php?page=playground
All Official Documentation:
Gfx Pipeline: https://www.lexaloffle.com/dl/docs/picotron_gfx_pipeline.html
Picotron Pod: https://www.lexaloffle.com/dl/docs/picotron_pod.html
Picotron Usr Data: https://www.lexaloffle.com/dl/docs/picotron_userdata.html
11 comments
Here is my first attempt to program a game with Pico-8. The goal is to drive 3 cats to the 4 marked fields in the left center. They will only go to these fields if Luna, the shepherdess and heroine, is at this moment at most 2 fields away. There are 3 levels in total. And if you complete all 3 levels in a short enough time, you get to enter a high score list. Attention: In the last level you can be run over by 2 vehicles!
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0 comments
Miracle Warriors Remake
Looking like I will likely hit the compression limit so will need to redesign or multicart maybe
Currently:
- bump into walls to gain XP and gain levels - to test systems
- slow moving through forest or mountains remove HP - to test systems
pressing X on some villages/castles will give the following - to test systems
- get ship1 and ship2 at the original game locations
- first cave (cave6) will give random item
- Kosama Village will give random equipment
- Castles will give random pouch items - guilders,fangs,herbs,reputation etc
-
Resurrection village will give new party member if you have enough XP
- all maps should work although not very interactive
- healing system with herbs should work
-
save system should work
- initial monster spawn system if press X in open .. you can only run away -- but their might be bugs .. sorry.
0 comments
CONTROLS-
⬅️⬆️➡️⬇️ to move blocks
🅾️/ Z to place blocks & confirm
❎/X to rotate blocks
▶ to start the game
HOW TO PLAY-
Move the blocks around, and connect the arrows to get a better score.
HOW IT WAS MADE-
Made within 18 days for the CRE-8 jam. I will link a dev blog detailing the development when it comes out.
This will sound silly; It was a really tough development emotionally, but it's finished! Thanks a ton for playing!
SOCIALS-
2 comments
Cell Machine
A PICO-8 port of Sam Hogan's hit puzzle game Cell Machine!
Drag cells around with your mouse. Other controls are explained in-game.
4 comments
Bitplanes are powerful, but they can be difficult to understand. How do you use them in PICO-8?
The short version: bitplanes let you draw colors to the screen without completely overwriting the existing colors, making it possible to do effects like shadows, transparency, etc. But be warned: they come with a lot of unintuitive restrictions, like monopolizing half your screen palette or requiring it to be set up in a particular way.
Longer version: PICO-8 colors are 4-bit numbers (0-15). The screen is a 128x128 4-bit image, but you could instead imagine it as 4 separate 128x128 1-bit images, overlaid on top of each other. By poking a particular location in memory, we can tell PICO-8 to draw to these "bit planes" separately. Normally, drawing overwrites any existing colors, but if we selectively disable some of the bitplanes, some bits of the old colors will remain onscreen.
Technical version: see "Technical details" below.
This post lists some specific examples and tricks that you can do with bitplanes. I won't attempt to fully explain how bitplanes work, but I'll leave some resources at the end.
4 comments
The Pixel Toy (TpxT)
2nd picotron game ever made!?
To play, copy and paste code below (click "show") into picotron playground (or actual picotron when it comes out!)
If it says "clipboard can not be read", then don't use base Firefox. if you aren't using base Firefox, then give picotron clipboard permissions in site settings.
vvv Code vvv
[hidden]
-- ThePixelToy
-- by antibrain
--[[
todo:
maybe some sort of GOL type
sounds/graphics/prebuilt maps when ptron 0.1 comes out
scene loader from clipboard to make something like TPT's save browser
more pixel types
more reactions
make neut/prot act like they do in TPT instead of acting like GAS/FIRE
saving/loading saves to hard disc. maybe using printh as file? cartdata?
chemestry?
air pressure
heat
simulate each pixel individualy so we can track its heat, speed, mass, weight, etc.
virus because virus in TPT is very satisfying
make fill/line tool not terrible
deco layers
ability to change sim speed
full keyboard support?
]]--
j=0
dc=5
size=0
sim=1
function _update() --update loop
mx,my,mb=get_mouse() --get mouse data
simulatepixels() --simulate pixels
controls() --allow game to be controlled
end
function _draw() --draw loop
mousedraw() --draw with mouse
ui() --draw ui
end
function simulatepixels()
if sim==1 then
for i=1,4000 do --4000 times per frame (30fps?)
local x=rnd(480) --get random x and
local y=rnd(270) --y values and
local c=pget(x,y) --get the color of that pixel.
if c==8 then --is red
if pget(x,y+1)!=5 and pget(x,y+1)!=7 then --check all bordering pixels and if any of them arent a wall
pset(x,y+1,c) --then set it to red
end
if pget(x,y-1)!=5 and pget(x,y-1)!=7 then --repeat for all other bordering pixels
pset(x,y-1,c)
end
if pget(x+1,y)!=5 and pget(x+1,y)!=7 then
pset(x+1,y,c)
end
if pget(x-1,y)!=5 and pget(x-1,y)!=7 then
pset(x-1,y,c)
end
end
if c==15 then --sand
if pget(x,y+1)==0 then --sand
pset(x,y+1,c) --f a l l
pset(x,y,0)
end
if pget(x,y+1)==12 then
pset(x,y+1,c)
pset(x,y,12)
end
if pget(x,y+1)==1 then
pset(x,y+1,c)
pset(x,y,1)
end
end
if c==2 or c==10 or c==11 then --gas (fire?)/neut/prot (i couldnt get neut/prot to act normal so i gave up :p )
local j=flr(rnd(4)) --pick random number
local q=flr(rnd(2))
if q==1 and c==2 then --decay randoly
pset(x,y,0)
end
if q!=4 and j==0 and pget(x+1,y)==0 then --go in random direction
pset(x,y,0)
pset(x+1,y,c)
end
if q!=4 and j==1 and pget(x-1,y)==0 then
pset(x,y,0)
pset(x-1,y,c)
end
if q!=4 and j==2 and pget(x,y+1)==0 then
pset(x,y,0)
pset(x,y+1,c)
end
if q!=4 and j==3 and pget(x,y-1)==0 then
pset(x,y,0)
pset(x,y-1,c)
end
if c==11 then
if pget(x+1,y)==1 and pget(x+1,y)==0 then
pset(x+1,y,11)
end
if pget(x-1,y)==1 and pget(x-1,y)==0 then
pset(x-1,y,11)
end
if pget(x,y+1)==1 and pget(x,y+1)==0 then
pset(x,y+1,11)
end
if pget(x,y-1)==1 and pget(x,y-1)==0 then
pset(x,y-1,11)
end
end
if c==2 and pget(x,y+1)==12 or pget(x,y-1)==12 or pget(x-1,y)==12 or pget(x+1,y)==12 then
pset(x,y,0)
end
end
if c==12 or c==1 or c==9 then --warder/deut/lava physics
if pget(x,y+1)==0 then --let it fall down
pset(x,y,0)
pset(x,y+1,c)
elseif pget(x-1,y)==0 then --if there's an open space and it isnt in free-fall,
pset(x-1,y,c) --allow it to drip left and
pset(x,y,0)
elseif pget(x+1,y)==0 then
pset(x+1,y,c) --right as well
pset(x,y,0)
end
if c==1 and pget(x,y+1)==11 or pget(x,y-1)==11 or pget(x-1,y)==11 or pget(x+1,y)==11 then
pset(x,y,11)
end
end
if c==16 then --remove fill border
pset(x,y,0)
end
if c==3 or c==4 then --wood/plant/foliage
if pget(x,y+1)==2 or pget(x,y+1)==9 then
pset(x,y,2)
end
if pget(x,y-1)==2 or pget(x,y-1)==9 then
pset(x,y,2)
end
if pget(x+1,y)==2 or pget(x+1,y)==9 then
pset(x,y,2)
end
if pget(x-1,y)==2 or pget(x-1,y)==9 then
pset(x,y,2)
end
if c==3 then
if pget(x,y+1)==12 then
pset(x,y+1,3)
end
if pget(x,y-1)==12 then
pset(x,y-1,3)
end
if pget(x+1,y)==12 then
pset(x+1,y,3)
end
if pget(x-1,y)==12 then
pset(x-1,y,3)
end
end
end
if c==14 then
if pget(x,y+1)==0 then
pset(x,y,0)
pset(x,y+1,14)
end
if pget(x,y+1)>0 and pget(x,y+1)!=5 and pget(x,y+1)!=14 and pget(x,y+1)!=29 then
circfill(x-4,y-4,16,2)
end
end
if c==6 then
if pget(x,y+1)==10 or pget(x,y+1)==9 then
pset(x,y,9)
end
if pget(x,y-1)==10 or pget(x,y-1)==9 then
pset(x,y,9)
end
if pget(x+1,y)==10 or pget(x+1,y)==9 then
pset(x,y,9)
end
if pget(x-1,y)==10 or pget(x-1,y)==9 then
pset(x,y,9)
end
end
if c==7 then
if pget(x,y+1)==0 then
pset(x,y,0)
pset(x,y+1,7)
end
if pget(x,y+1)==12 then
pset(x,y+1,7)
end
if pget(x,y-1)==12 then
pset(x,y-1,7)
end
if pget(x+1,y)==12 then
pset(x+1,y,7)
end
if pget(x-1,y)==12 then
pset(x-1,y,7)
end
if pget(x,y+1)==2 or pget(x,y+1)==9 then
pset(x,y,12)
end
if pget(x,y-1)==2 or pget(x,y-1)==9 then
pset(x,y,12)
end
if pget(x+1,y)==2 or pget(x+1,y)==9 then
pset(x,y,12)
end
if pget(x-1,y)==2 or pget(x-1,y)==9 then
pset(x,y,12)
end
end
if c==9 then
local q
if pget(x+1,y)==6 and q==0 then
pset(x+1,y,c)
end
if pget(x-1,y)==6 and q==0 then
pset(x-1,y,c)
end
if pget(x,y+1)==6 and q==0 then
pset(x,y+1,c)
end
if pget(x,y-1)==6 and q==0 then
pset(x,y-1,c)
end
if pget(x+1,y)==12 or pget(x-1,y)==12 or pget(x,y+1)==12 or pget(x,y-1)==12 then
pset(x,y,6)
q=1
else
q=0
end
end
end
end
end
function mousedraw()
if mb==1 and not(btn(5)) then --if left click then
circfill(mx,my,size,dc) --draw red/wall at mouse pos
elseif mb==2 then --if right click (or ctrl click)
circfill(mx,my,size,0) --erase (draw black at mouse pos)
end
if btn(5) then --check if x is pressed
if mb==1 and j==0 then --only do this once per fill!
ox=mx --set old mx to mc
oy=my --same for old my
j=1 --j
end
if mb==1 then-- if mousedown
omb=1 --set old mouse click to 1
rect(ox,oy,mx,my,16) --fill outline
elseif omb==1 then --if its one then
rectfill(ox,oy,mx,my,dc) --fill
omb=0 --set old mouse button to 0 (because mouse was released)
ox=nil --nil ox and oy
oy=nil
j=0 --j
end
else
ox=nil --if x isnt pressed, nil x and y, then j
oy=nil
j=0
end
end
function ui() --ui bar
rectfill(0,0,480,8,29) --bar
circfill(4,4,2,dc) --current color
rect(0,0,8,8,5) --outline on current color
print("size:"..flr(size),50,1,0)--brush size
print(scolor,12,1,0)
print("Cpu: "..flr(stat(1)*10),100,1,0)
if sim==1 then
print("running",445,1,0)
else
print("paused!",445,1,0)
end
if dc==0 then scolor="erase"end
if dc==1 then scolor="deut"end
if dc==2 then scolor="fire"end
if dc==3 then scolor="plant"end
if dc==4 then scolor="wood"end
if dc==5 then scolor="wall"end
if dc==6 then scolor="stone"end
if dc==7 then scolor="snow"end
if dc==8 then scolor="eater"end
if dc==9 then scolor="lava"end
if dc==10 then scolor="proton"end
if dc==11 then scolor="neutron"end
if dc==12 then scolor="water"end
if dc==13 then scolor="paint"end
if dc==14 then scolor="bomb"end
if dc==15 then scolor="sand"end
end
function controls() --controls
if btn(1) then dc+=0.1 end --change brush color
if btn(0) then dc-=0.1 end
if dc<0 then dc=0 end --dont let color be too much or little or else
if dc>15 then dc=15 end --the screen dies :(
if btn(2) then size+=0.1 end --change brush size
if btn(3) then size-=0.1 end
if size<0 then size=0 end--dont let it go negative
if btn(4)==true then sim=0 else sim=1 end --pause when z is held
if btn(1)==false and btn(0)==false then dc=flr(dc) end
end |
2 comments
PICO-8 supports bitplane drawing; the wiki (search "bitplane") has a description of how they work:
> 0x5f5e / 24414
> Allows PICO-8 to mask out certain bits of the input source color of drawing operations, and to write to specific bitplanes in the screen (there's 4 of them since PICO-8 uses a 4BPP display). Bits 0..3 indicate which bitplanes should be set to the new color value, while bits 4..7 indicate which input color bits to keep.
> For example, poke(0x5f5e, 0b00110111) will cause drawing operations to write to bitplanes 0, 1, and 2 only, with 0 and 1 receiving the color value bits, 2 being cleared, and 3 being unaltered.
> This formula is applied for every pixel written:
> dst_color = (dst_color & ~write_mask) | (src_color & write_mask & read_mask)
This is precise and correct, but I find it a bit hard to understand. So I made this cart to give myself an interactive sandbox where I can play around with bitplanes, to see how they affect drawing.
1 comment
